The great acceleration is about humans and their rapid population increase. It has become apparent that human driven change is effecting the rates processes on Earth. Choose from the following all the true statements about the "global scale" impacts of humans? (select more than one)

Which of the following represents the results of a review of well-controlled studies of vitamin c supplementation on the resistance to, and recovery from, colds? there was a reduction in the duration of colds by 50% on the average. there was a slight effect on reducing the duration and severity of colds for people taking vitamin c supplements. there was a significant reduction in the duration of colds in people who consumed at least one gram a day. there was a significant reduction in the number of colds only in people who consumed > three grams per day.